$bigScreenBg:rgba($color: #003366, $alpha: 0.5);




// 混入
@mixin display-flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

@mixin colorWhite {
    color: white; 
}

@mixin lineHeight($height){
  line-height: $height;
  text-align: center;
}